Studies of craters’ dimension for long-pulse laser ablation of metal targets at various experimental conditions

Margarone, D.; Láska, L.; Torrisi, L.; Gammino, S.; Krása, J.; Krouský, E.; Parys, P.; Pfeifer, M.; Rohlena, K.; Rosiński, M.; Ryć, L.; Skála, J.; Ullschmied, J.; Velyhan, A.; Wołowski, J.

doi:10.1016/j.apsusc.2007.10.023

Cited by 14 publications

(8 citation statements)

References 21 publications

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“…10 15 Wmm 2 / cm 2 (Margarone et al, 2007). The inverse bremsstrahlung prevails for both the lateral maxima, which Il 2 , 10 15 Wmm 2 /cm 2 , while the maximum yield of FP ¼ 2200 mm is related to the resonant absorption process, which Il 2 .…”

Section: Discussionmentioning

confidence: 95%

Self-focusing effect in Au-target induced by high power pulsed laser at PALS

et al. 2008

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Self-focusing effects, induced by ASTERIX pulsed laser at PALS Laboratory of Prague, have been investigated. Laser was employed at the third harmonics (438 nm) and intensities of the order of 10 16 W/cm 2 . Pure Au was used as thin target and irradiated with 308 incidence angle. An ion energy analyzer was employed to detect the energy-to-mass ratio of emitted ions from plasma. Measurements were performed by changing the focal point position with a high spatial resolution stepmotor. Results demonstrated that non linear processes, due to self-focusing effects, occurs when the laser beam is focused at about 200 mm in front of the target surface. In such conditions, a new ion group, having high charge state and kinetic energy, is produced because of the increment in temperature of the laser-generated plasma.

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Section: Discussionmentioning

confidence: 95%

Self-focusing effect in Au-target induced by high power pulsed laser at PALS

et al. 2008

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“…Большой интерес в последнее время с точки зрения моделирования сверхскоростного удара [6] при V  10-100 км/с вызывают исследования структуры кратеров, образованных мощными лазерными импульсами [19][20][21][22]. Очевидно, что такое моделирование требует значительно больших интенсивностей лазерного излучения вплоть до I  10 11 -10 14 Вт/см 2 .…”

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Shock Wave Generation in the High-Power Laser Interaction With Polycrystalline Targets

Burdonsky¹,

Golsov²,

Leonov³

et al. 2013

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Московский физико-технический институт, Московская обл., г. Долгопрудный, Россия Экспериментальные исследования генерации ударных волн в поликристаллических мишенях проводились на мощной Nd-лазерной установке «Сатурн» при значениях интенсивности в пределах 10 12-10 13 Вт/см 2. Обосновано применение теоретической модели трансформации энергии импульсного лазерного источника в энергию ударной волны при абляционном процессе на поверхности мишени в режиме гидродинамического воздействия. Проведено сравнение рассчитанных и измеренных параметров образующихся кратеров для различных типов мишеней. Ключевые слова: лазерное моделирование ударных процессов, плазменный факел, ударная волна, лазерная абляция, сверхскоростной микрометеоритный удар.

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“…The ablation yield exhibits a linear dependence on the focused laser energy. The comparison of this dependence with the dependence of ablation yield of Ta ions measured under the same conditions 10 shows that the number of the ablated atoms from the graphite is about 75 times higher than the number of Ta atoms. Integrating the currents of ions shown in Fig.…”

Section: Resultsmentioning

confidence: 89%

Generation of high currents of carbon ions with the use of subnanosecond near-infrared laser pulses

Krása

Velyhan

Margarone

et al. 2010

Review of Scientific Instruments

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Emission of carbon currents reaching values up to 2 A/cm(2) at a distance of 1 m from the laser ion source driven by the subnanosecond Prague Asterix Laser System operated at a fundamental wavelength of 1315 nm is reported. Graphite targets were exposed to intensities up to 5x10(16) W/cm(2) varying both the laser energy and the position of the laser beam focus with respect to the target surface. The maximum energy gain of carbon ions was approximately = 1 MeV/u. At high laser intensities the shape of time-of-flight spectra is also formed by plasma outbursts, whose growth correlates with the oscillatory self-focusing of the laser beam.

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Studies of craters’ dimension for long-pulse laser ablation of metal targets at various experimental conditions

Cited by 14 publications

References 21 publications

Self-focusing effect in Au-target induced by high power pulsed laser at PALS

Self-focusing effect in Au-target induced by high power pulsed laser at PALS

Shock Wave Generation in the High-Power Laser Interaction With Polycrystalline Targets

Generation of high currents of carbon ions with the use of subnanosecond near-infrared laser pulses

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